From: William Cohen <wcohen@nc.rr.com>
To: John Levon <levon@movementarian.org>
Cc: "Santos,
Jose Renato G (Jose Renato Santos)" <joserenato.santos@hp.com>,
William Cohen <wcohen@redhat.com>,
xen-devel@lists.xensource.com,
oprofile-list <oprofile-list@lists.sourceforge.net>,
Aravind Menon <aravind.menon@epfl.ch>,
G John Janakiraman <john@arivalai.hpl.hp.com>,
"Turner, Yoshio" <yoshio_turner@hp.com>
Subject: Re: [Xen-devel] [PATCH] Xenoprof: Enabling performance profiling in Xen
Date: Mon, 11 Apr 2005 23:10:32 -0400 [thread overview]
Message-ID: <425B3C28.3040708@nc.rr.com> (raw)
In-Reply-To: <20050411231147.GA21084@compsoc.man.ac.uk>
John Levon wrote:
> On Mon, Apr 11, 2005 at 03:37:57PM -0700, Santos, Jose Renato G (Jose Renato Santos) wrote:
>
>
>>http://lists.xensource.com/archives/html/xen-devel/2005-04/msg00256.html
>
>
> Where can I get the diff against oprofile userspace source, plus a diff
> of the changes to the kernel driver?
>
> (It'd be really handy if somebody wrote up a little bit about Xen (no
> idea what a domain is) for us OProfile people too)
Xen is a virtualization system. It allows multiple domains (instances of
the OS) to run on a computer using a hypervisor. Think of a domain as a
Virtual Machine in the old 360 mainframes. Thus, a physical machine
could appear to be multiple logical machines, each with a different disk
image and installation running on it.
Xen uses paravirtualization, so the kernel needs to be modified to make
calls to the hypervisor rather than directly touch hardware like the
memory management unit. This is bit different than VMware which emulates
the machine and the OS doesn't need to be modified. However, Xen has
better performance a a result of this. Note that user applications do
not need to be modified to run on Xen. There is more information about
Xen at:
http://xen.sf.net/
Here are the start of the threads in the xen-devel mailing list
discussing the patches to provide oprofile support:
http://lists.xensource.com/archives/html/xen-devel/2005-04/msg00256.html
http://lists.xensource.com/archives/html/xen-devel/2005-04/msg00257.html
http://lists.xensource.com/archives/html/xen-devel/2005-04/msg00259.html
-Will
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prev parent reply other threads:[~2005-04-12 3:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-11 22:37 [PATCH] Xenoprof: Enabling performance profiling in Xen Santos, Jose Renato G (Jose Renato Santos)
2005-04-11 23:11 ` [Xen-devel] " John Levon
2005-04-12 3:10 ` William Cohen [this message]
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